JPS6019582B2 - Cassette installation mechanism in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette wire loading mechanism in a tape recorder.

The purpose of this is to temporarily remove the cassette property detection levers, such as the erasure prevention lever and the chrome cassette detection lever, from the cassette so as not to interfere with the installation of the cassette into the cassette drive mechanism. The purpose of this invention is to provide a cassette installation mechanism that allows the cassette to escape.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The tape recorder in this embodiment has a mechanism for bringing a cassette A lying on its side to a cassette drive mechanism section B located at the back. By being pushed to the back, the slider moves at double speed in the back direction together with the slider, and when the holder 3 is inserted into the holder 3, the holder 3 rotates downward and descends into the cassette drive mechanism section B. This will be explained in detail below.

The table 2 has rising portions 2a on both sides at its front end.
, 2a' are formed, and a transparent part 4 made of glass or plastic is integrally attached between the rising parts 2a and 2a'. Slope-shaped protuberances 2b and 2b' that are sequentially higher and higher in the distal direction are formed on both sides of the transparent member 4 in the rear direction.
Between b and 2b', there is a slightly lower and sloped ridge 2b.
, 20, a mirror 5 tilted in the same direction is attached. Reference numeral 2c denotes a bottom portion having approximately the same size as the cassette A, and guides 2d and 2d' for guiding the slider 1 stand up on both sides of the bottom portion, and further, both sides 2e and 2e' extend toward the back. The wife has been reinforced with reinforcement parts for two days.

This table 2 has a fixing plate 6 to the chassis C,
The movement in the front and back direction is guided by guide rollers 7 and 7' pivotally supported by the guide rollers 7 and 7', and the damper rubbers 8 and 8' mounted on the rising pieces 6a and 6'a are stepped from the fixed plates 6 and 6'. The protruding movement is stopped by the parts 2e, , 2e,' being brought into contact with each other.

2g and 2g' are rollers 9 extending on both sides of the front end of the holder 3;
9' is the depressed part, and 2M is the reinforced part.

On the other hand, on the lower surface of both sides 2e, 2e' of this table 2, pulleys 10, 10', 11, 11' are pivotally supported at the front and rear parts of the respective sides 2e, 2e'.
Between 0 and 11 and between 10' and 11', thin strips 12 and 12' are wound through springs 22 and 22'.

Guide rollers 13 and 13' perform the same function as the guide rollers 7 and 7', and at the same time support the rail portions 2e2 and 2e2' of the sides 2e and 2e' from below.

The guide rollers 13, 13' are pivotally supported by position adjustment plates 14, 14' whose positions in the front and back direction can be adjusted with respect to the chassis C through the largest holes 14a, 14'a.
b, 14'b are the connecting plates 15, 1 of the thin strips 12, 12'.
5' is attached. In addition, the position adjustment plate 14,1
4', the position adjusting plates 14, 14' are provided with holes 14c, 14'c in the form of isosceles triangles or regular triangles whose bases are perpendicular to the movement direction, and holes 14c, 14'c of the same shape are provided in the chassis C. A hole is provided so that the apex of the triangle is located opposite to the apex of the holes 14c and 14'c of the position adjustment plates 14 and 14', so as to overlap with the holes 14c and 14'c, and the overlapping hole is By inserting an adjustment tool such as a screwdriver, the position of the position adjustment plates 14, 14' relative to the chassis C can be adjusted accurately. Further, these thin strips 12, 12' are connected to the sides la, la' of the slider 1 by means of other connecting plates 16, 16'.
is also connected. Both sides of the rear end of the table 2 and the fixing plate 6
, 6', the springs 17, 17' are installed between the springs 17 and 6'.
The table 2 is pulled in a direction to protrude. Next, at the front end of the slider, a notch lb for escaping from the slope-like protuberances 2b, 2b' of the tapered 2 and the mirror 5 is formed, and a cassette mounting part lj is formed on both sides of the front end.
Rising pieces lc, l for positioning cassette A to be inserted into
c' is formed. ld, ld'' are holes where the reel pin of cassette A is located, le, le' are guide pieces guided by guides 2d, 2d' of table 2, lf, lf
' are the rising pieces lc, lc' and the guide pieces le, le
This is a rising piece that positions the cassette A in cooperation with '. Further, 1g, 1g', lh, lh', li, li' are guide pieces that are sequentially guided by guides 3a, 3a' of the holder 3, respectively. The holder 3 is rotatably supported at its rear end by a shaft 19 on a fixing plate 18 to the chassis C, and is always given a downward rotational force by a spring 20.

In the front part of this holder 3, when the holder 3 rotates downward, the cassette A that has entered on the slider 1 is
A presser piece 3b, which presses down, is formed with three pieces. Further, a mirror 21 tilted forward is attached to the reinforcing portion 3c. Reference numeral 23 denotes a lamp that illuminates the tape winding section of the cassette A located in the cassette drive mechanism section B;
is attached to a printed circuit board 24, which is suspended from the chassis C by a support plate 25.

Reference numeral 26 denotes an eject lever, which is rotatable about a shaft 27, and has an engaging piece 26a integral with the eject lever 26.
is opposed to the front part of the rising part 28a of the sliding plate 28 that slides with respect to the chassis C, and another actuating piece 26b
is opposed to the lower surface of the pin 29a of the cassette push-up lever 29.

The cassette push-up lever 29 is rotatable about a shaft 30, and the push-up lever 29b is located on the bottom surface of the cassette drive mechanism section B. The above-mentioned sliding plate 28 is guided by the outermost holes 28b and 28c with respect to pins 31 and 32 provided on the chassis C, and is normally moved forward by a spring 33. A rising piece 28d that pushes the relief plate 34 backward is formed at the rear of the sliding plate 28. This relief plate 34 is positioned so as to be sandwiched approximately at right angles to the chassis C, and its lower part is pulled rearward by a spring 35, so that its upper part is slightly inclined forward. This escape plate 34 has a corresponding twill piece 34a for the cassette A and a rising piece l of the slider.
f'' A pressed piece 34b to be pressed is formed respectively, and a hole 34c through which the chrome cassette detection lever 36 is inserted and presses the stepped portion 36a, and a pressing piece 34d that presses the erase prevention lever 37 of the cassette A backward. is formed. The erasing lever 37 stands up while being sandwiched between the chassis C and protrudes forward, making it impossible to operate a recording lever (not shown). The chrome cassette detection lever 36 is pushed forward by a spring 38, and in this state a switch (not shown) is actuated to switch the tape recorder circuit to a chrome cassette. A string 39 connected to the reinforcement part 2f at the rear of the table 2
is connected to the chassis C via a spring 41 after being wound several times around the pulley portion 43b of the flywheel 43 of the governor 40, as shown in FIGS.

This governor 40 includes a flywheel 43 rotatably supported on a shaft 42 in which a plurality of circumferential grooves 42a are formed, and a chamber 43a is formed in the bearing portion of the flywheel 43. A sludge agent 44 such as grease that exhibits viscous resistance is sealed between the circumferential grooves 42a. 45 is a fixing plate that fixes the shaft 42 to the chassis C.

Next, the operation in the above configuration will be explained.

1 to 3 show the state in which both the slider and the table 2 protrude forward. At this time, when the cassette A is attached to the cassette attachment part lj of the slider, the cassette A is attached to the table 2 as shown in FIG. Bull 2 slope-like protuberance 2b, 2M
In a state slightly inclined from this, the rising pieces lc, lc', l
f, lf', and guide pieces le, le'. If the front end of the table 2 is pushed inward in this state, the pulleys 10, 10', 11, 11' at the rear will also move rearward, and the pulleys 11, 11' will fix the table 2 to the connecting plates 15, 15'. The strings 12, 12' that have been
The slider 1, which is connected by the connecting plates 16, 16', is also moved rearwardly. At this time, Hoso 12,1
As for 2', both the upper and lower parts of pulleys 11 and 11' are pushed backward at the same time, so slider 1 is moved backward by a distance twice as much as the moving distance of pulleys 11 and 11', that is, the moving distance of table 2. So this slider 1
moves backward at twice the speed of pushing table 2.

During this time, the table 2 moves against the tension of the springs 17, 17' while being guided by the guide rollers 7, 7', 13, 13', and the slider 1 moves with its guide pieces 1g, 13'.
g, lh, lh', li, lr are guides 3a of holder 3
, 3a', and enters the holder 3.

Then, the rising piece lf' of the slider pushes the pressed piece 34b of the relief plate 34, and pushes the relief plate 34 backward. Therefore, the erasure prevention lever 37,
The chrome cassette detection lever 36 is pushed backwards and escapes from the cassette A attached to the slider. At this point, the depressed parts 2g and 2g' of the table 2 are located at the lower ends of the rollers 9 and 9' on both sides of the holder 3, so the rollers 9 and 9' fall into the depressed parts 2g and 2g. Therefore, the holder 3 is rotated forward by the action of the spring 20.

At this time, the slider is the guide 3a, 3a' of the holder 3.
Since the holder 3 is guided in this direction and is away from the bottom 2c of the table 2, the holder 3 rotates with the slider inserted. During this rotation, the holder 3 is held by the holding pieces 3b, 3.
Therefore, cassette A installed in slider 1
Press and move the cassette A to the lower cassette drive mechanism section B.
Engage with. When the cassette A is properly engaged with the cassette drive mechanism section B, the pressed piece 34b of the relief plate 34 protrudes to the upper surface of the cassette B, so the relief plate 34 returns to its original state, thereby preventing erasure. The lever 37 engages with the opened erasure prevention hole of the cassette A, and the chrome cassette detection lever engages with the chrome cassette discrimination hole. In the above-mentioned advancing operation of the cassette A, the effect of the four governors is not exhibited.

That is, during this operation, the thin strips 39 move in a direction that loosens them relative to the flywheel 43, so that the loosening is immediately absorbed by the spring 41, and the thin strips 39 simply slide against the flywheel 43. Therefore, since flywheel 43 does not rotate, governor 40 does not exhibit its effect. The cassette A installed in the cassette drive mechanism section B as described above performs recording and playback operations in that state, but since the tape winding section of the cassette A is illuminated by the lamp 23, the tape winding section is illuminated by the lamp 23. The state of the quantity part is reflected on the mirror 21 of the holder 3, and further reflected on the mirror 5 of the table 2.
will be reflected.

Therefore, by looking into the transparent member 4 of the tape recorder 2 from above the tape recorder, the cassette A can be seen through the mirrors 5 and 21.
You will be able to check the condition of the tape winding section. Also,
By changing the shape and size of the mirror 21, the tape winding section can be attached to the mirror 5, 2 from above the tape recorder.
1, and also from a position approximately horizontally in front of the transparent member 4.
Next, in order to take out the cassette A assembled in the cassette drive mechanism section B as described above, the eject lever 2 is
Just press 6 downwards.

As a result, the super-moving plate 28 is first pushed inward by the engagement piece 26a, and its rising portion 28d pushes the escape plate 34 backward. As a result, the pressed piece 34b separates from the cassette A, and both the erasure prevention lever 37 and the chrome cassette detection lever 36 separate from the cassette A. By further pushing the eject lever 26, the operating piece 26b pushes the pin 29a of the cassette push-up lever 29 upward, causing the cassette push-up lever 29 to pivot upward about the shaft 30. As a result, the pushing portion 29b pushes the bottom back surface of the cassette mounting portion li of the slider 1 upward, thereby rotating the holder 3 upward. Then, the rollers 9, 9' of the holder 3
When the table 2 is completely lifted from the depressed parts 2g and 2g', the table 2 is released from its restraints and the spring 17 is released.
, 17'. During this protrusion, the pulleys 10, 10' pull the strips 12, 12' forward, and the connecting plates 16, 16' move the sliders connected to the strips 12, 12' as in the case of the above-mentioned approach. Force the aircraft to move forward at double speed.

Furthermore, during this protrusion, the table 2 is guided by the guide rollers 7, 7', 13, 13', and the slider is guided by the guide pieces le, le', 1g, 1g', lh, l.
h', li, li'' guide 2d of table 2
, 2d' and the guides 3a, 3a'' of the holder 3 are guided. Then, when the stepped portions 2e, 2e, ' of the table 2 come into contact with the damper rubbers 8, 8', the table 2 stops its protruding operation. At this time, slider 1 is
The state has returned to that shown in the figure, and therefore the cassette A has climbed onto the slope-like protuberances 2b, 2b'. Therefore, the protruding cassette A can be easily removed. In the above-described projecting operation, the governor 40 performs its function.

That is, at the time when the table 2 starts to protrude, the thin strips 39 become tense and bite into the flywheel 43, trying to rotate the flywheel 43. However, this flywheel 43 has a large inertia, and therefore the protruding force exerted by the springs 17, 17' is greatly weakened, and the table 2 gradually protrudes. Thereafter, rotational resistance is applied to the flywheel 43 by the viscous agent 44, and the tensile force of the spring 41 is also applied, so that the table 2 eventually protrudes gently. In the above description, the point at which the slider leaves the bottom 2c of the table 2 and descends to the cassette drive mechanism section B by the holder 3, that is, the descending position of the slider relative to the table 2 is adjusted by moving the position adjustment plates 14, 14' in the front and back direction. This can be done by adjusting the movement.

That is, the position adjustment plates 14, 14' have thin strips 12, 12'.
Connecting plates 15, 15' are attached to fix the ends of the narrow strips 12, 12', so if the position adjusting plates 14, 14' are moved forward by the same distance, the lower portions of the narrow strips 12, 12' will be moved. Pulled forward, and thereby the upper part rearwardly, the slider, which is fixed to this upper part by means of connecting plates 16, 16', moves rearwardly by the displacement distance. When the position adjusting plates 14, 14' are moved backward, the slider 1 is moved forward by the same distance. Therefore, the relative position of the slider with respect to the table 2 can be adjusted, and the descending position can therefore be adjusted. This adjustment is normally done during assembly. From the above, according to the present invention, when inserting the cassette into the cassette drive mechanism,
Since the cassette property detection levers such as the erasure prevention lever and the chrome cassette detection lever escape from the cassette, the cassette can be installed without any problem.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a tape recorder mechanism according to an embodiment of the present invention, FIG. 2 is a side view, and FIG.
4 is a sectional view of the cassette in a playing state, FIG. 5 is a side view of the governor, and FIG. 6 is a sectional view.

A...Cassette, B...Cassette drive mechanism section, C...
...Shadow, 1...Slider, 2...Table, 3...
...Holder, 4...Transparent member, 5...
Mirror, 6, 6'... Fixed plate, 7, 7'...
·guide.

-ra, 8,8'"""Dan/gum, 9,9'...roller, 10,10'...pulley, 11,11'...
Pulley, 12, 12'... String, 13, 13'... Guide roller, 14, 14'... Position adjustment plate, 15, 1
5'... Connection plate, 16, 16'... Connection plate, 17,
17'...Spring, 18...Fixing plate,
19... shaft, 20... spring, 21... mirror, 22, 22'... spring, 23... lamp, 24
...Printed circuit board, 25...Support plate, 26...
...Eject lever, 27 ...Shaft, 28
...Sliding plate, 29 ...Cassette push-up lever, 30 ...Shaft, 31 ...Pin, 3
2... Pin, 33... Spring, 34... Relief plate, 3
5... Spring, 36... Chrome cassette detection lever, 37... Erase prevention lever, 38... Spring, 39... String, 40... Governor, 41... Spring, 42... Shaft, 43・…．・Flywheel, 44...
... Viscous agent, 45 ... Fixed plate. Figure 1 2
Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A slider that moves a cassette mounted laterally, a table that moves the slider, and a holder that holds the cassette that has been moved toward the back by the slider and lowers it into the cassette drive mechanism section. and a release plate that is pressed by the cassette or slider when the cassette is lowered into the cassette drive mechanism section and temporarily releases the cassette property detection levers such as the erasure prevention lever and the chrome cassette detection lever from the cassette. A cassette installation mechanism in a tape recorder.